Tourists have flocked back to Sri Lanka's palm-fringed beaches since a bloody civil war ended in 2009, but environmentalists warn unchecked development means some areas are now so polluted, swimming there is a health hazard.

There is a small but growing set of people who have had the opportunity to see the Earth as a planet, and view its changing seasons and weather patterns from above. Astronauts are a rare breed: men, and, increasingly, women, ...

Virgin Galactic later this month in Mojave, California, is preparing to roll out its new SpaceShipTwo, a vehicle the company hopes will one day take tourists to the edge of space. It comes roughly 15½ months since an earlier ...